Trolley-harp.



J. C. OLLARD.

TROLLEY HARP.

APPLICATION man APR. 8. 1914.

Patented June 1, 1915.

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Jai/ins c. oLLAnD, or Tacoma, WASHINGTON.

TROLLEY-HARP.

Specification of Letters Patent.

Patented J une 1, 1915.

Application filed April 8, 1914. Seria1 No. 830,376.

Y' a citizen of the United' States, and a resident of Tacoma, in the-county of Pierce, State of Washington, have invented certain new and useful Improvements in TrolleyHarps, of which the following is a specification.

rlhis invention relates to trolley harps and has for its objects to prevent the spreading of the tines of the harp; to retain the springs and spring-retaining plates in position when the pin is removed; and to reduce the cost of manufacture. y

I attain these and other objects by the devices and arrangements illustrated in the accompanying drawings, in which Figure l is a vertical section of my im'- proved harp andof the trolley wheel mounted therein; Fig. 2 is an elevation of one of the spring-retaining plates; Fig. 3 is an elevation of a part of the harp when the wheel pin is removed,vshowing the plate holding the spring in position; and Fig. 4 is a cross-section of one tine of the harp on the line 4-4 in Fig. 3 and showing particularly the means formed on the harp for retaining the plate in position.

Similar numerals of reference refer to similar parts throughout the several views.

The trolley wheel l is mounted on a steel sleeve 2, which turns freely on a bushing 3, which in turn is mounted on and freely turns on a hollow wheel pin 4. The side motion of the wheel l along the pin 4, as the wheel wears away, is counteracted by means of two plates 5, one on each side thereof, which plates are prevented from rotation by the following described means and have a. limited lateral motion along the pin 4, and are pressed against the sides of the trolley wheel l, to hold it central on the pin 4, by means of springs 6, which are inclosed within the` annular chambers 7 in the bulbs of the two tines of the harp.`

The harp consists of a shank 8 adapted toV be fastened on the end of a trolley pole, and

has two tines 9 extending therefrom, each tine terminating in a substantially hemispherical bulb 10 and l1. Each such bulb 10 and 11 has an annular chamber 7 in which the springs 6 lie. A central hole passes entirely through one bulb 10 and is adapted to receive the pin 4 therethrough, said pin 4 passing into a similar hole in the bulb l1, which however does not pass entirely through the said bulb. The entrance to the hole in the bulb 10 is enlarged to form a shoulder. The pin 4 is hollow and is prevented from falling out of the harp by a pin 12 which passes through the bulb l1 and the end of the pin 4. The other end of the pin 4 is closed by a cap 13 which is riveted thereto and which is shaped like a cup. The cup portion fits in the hollow pin 4 and the rim of the cup is turned outward to form a flange 14 which extends beyond the pin 4 and engages the shoulder formed by the enlarged entrance to the said central hole. The rivet 15 which secures the cap 13 to the pin 4 passes through the cup portion and is therefore exposed to the outside and is adapted to be engaged by a tool when the pin 4 is to be removed.

For some reason, I find that the tines of such a harp have a tendency to spread apart and I have therefore provided the above means of tying the tines together, since the pin 12 holds the wheel-pin 4 to the bulb 11 and the flange 14 engages the shoulder in the bulb 10, thuspreventing any spreading between the said parts.

When a harp is being disassembled to remove an old wheel, or is being assembled, it is necessary to remove the wheel-pin 4 and thus the said wheel and its bushing is freed, and the plates 5 would immediately fall away and release the springs 6, unless they were held in place, and yet it is necessary that the said plates be allowed a limited axial motion to provide for the wear of the side of the wheel hub. The plates 5 are each provided with a long lug 16 which is offset at its lower end as shown in Fig. 1. The tines 9 are each provided with an inward extending loop 17 through which the said lug 16 loosely passes; and with a shoulder 18 on which the end of the said lug 16 rests. Thus, referring to Fig. 8, it will be seen that, when the pin 4 and the wheel have been removed, the said plate 5 is held in place by the lug 16 engaging the loop 17 and the shoulder 18, thus also retaining the spring 6 in place as shown. In this way the act ofv assembling Vthe trolley parts is greatly facilitated.

Having described my invention, what I claim is 1. In a trolley harp, the combination with a shank adapted to be fastened on a trolley pole; a pair of tines extending from the shank; annular spring-retaining chambers formed in each tine; a pair of loose plates closing said spring-retaining chambers; a

-on each tine, through which said lug passes,

whereby said plate is loosely held in front of said spring-retaining chamber.

2. In atrolley harp, the combination with a shank adapted to be fastened on a trolley pole; a pair of tines extending from the shank; annular spring-retaining chambers formed in each tine; a pair of loose plates lug extending down from each of said plates; and means formed on the tines and adapted to be engaged by the lug, vWliereloyr ,1;

said plates are loosely held in front of said spring-retaining chambers, Y Y A i Y Y JAMES o. OLLARD. Witnesses v M. F. MCNEIL, 'Wr SALAYERGUIST.- l

Copies of this patent may be obtained for ve cents each, by addressing the lComins'sioner of Patents,

Waslng'toml). G. 

